Exhaust muffler



Apr. 17, 1923.

C. G. STOCKTON EXHAUST MUFFLER Filed June 2l,

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ATTORNEYS.

Patented Apr. 17, 1923.

PATENT OFFICE.

CHARLES G. STOCKTON, OF OCEAN GROVE, NEW JERSEY.

f EXHAUST MUFFLER.

Application led June 21, 1922. Serial No. 569,867.

To all whom t may concern.'

Be it known that I, CHARLES G. STooKToN, a citizen of the United States, and a resident of Ocean Grove, in the county of Monmouth and State of New Jersey, have invented new and useful Improvements in Ex'- haust Mufflers, of which the following is a specification.

The objects of this invention are to secure an improved device which vshall serve not only to muflle the noise of the exhaust of a'n engine, such as a gas engine, but also to reduce to a minimum loss of power from muffling.; to secure a construction which shall be small and' compact' and at the same time effective; to enable it to be simply and easily constructed of sheet metal, and to obtain other advantages and results as may be brought out in the following description.

Referring to the accompanying drawings, in which like numerals of reference indicate the same parts throughout the several views,

Figure 1 is a longitudinal central section of a muffler embodying my invention, taken on line 1-1 of Fig. 3;

Figure 2 is a similar longitudinal section taken in a plane at right angles to that of Fig. l, on line 2 2 of Fig. 3;

Figure 3 is a cross-section on line 3-3 of Fig. 2;

Figure 4 is a perspective view of certain interior partitions, removed from the cas- 111s;

Figure 5 is a detail perspective view of one of the end plates, and

Figure 6 is a side elevation, on smaller scale, of a mufller of my improvedconstruction.

In the specific `embodiment of the invention shown in said drawings, 1 indicates a tubular casing of any suitable form or size, such as a pipe, adapted to enclose the various parts and form with the same the desired passages for the exhaust gases, vapors or the like. lVithin this casing are longitudinally extending partitions 2 and 3, which I have shown as bent up out of sheet metal and arranged diametricallly opposite, the said partitions having portions 4 and 5 in the said d iametric plane, their outer edges being flanged as at 6 and 7 for securing in place and their inner edges terminating a short distance from the central axial line of the muliler, as at 8 and 9, and merging into outwardly bent approximately radial portions 10 and l1 which terminate considerably short of the circumference of the muffler and are preferably integral with the diametric portions 4 and 5. I have shown the portions 4, 10 and 5,V 11 as connected by sharply rounded bends of the sheet metal, at 8 and 9, and the parts 10 and l1 as extending about two-thirds of the way outward to the oircumference, but obviously these details can be varied.

Other partitions 12 and 13 have arcuate port1ons 14 and 15 adapted to fit against the casing 1 for about one-fourth of its circumference, as shown in Figure 3, the flanges 6 and of the first-mentioned partitions 2 and 3 being seated against the arcuate portions with their free edges coincident, as shown in F igures 3 and 4, and preferably secured thereto, as by brazing. At their opposite edges from those receiving the said flanges 6 and 7,' the arcuate portions 14 and 15 merge 1nto approximately radially disposed portions 16 and 17 which terminate short of the central axial line of the device and form each with its adjacent portion 10 or 11 of the first-mentioned partitions 2 and 3, outwardly flaring spaces 18 and 19. Furthermore, the said approximately radial portions 16 and 17 merge at their inner ends, by sharp bends 20 and 21, into approximately radial outwardly extending flanges 22 and 23 which form with the radial portions 4 and 5 of the first-mentioned partitions 2 and 3 outwardly flaring-spaces 24 and 25.

All of said partitions are madeof suitable sheet metal to be readily shaped into the formsk described and at the same time retain said forms. Their inner portions are furthermore stayed and held in relative posi- `tion by transverse partitions 26 which extend substantially through the two diametrically opposite outwardly flaring spaces 24 "and 25 and fill the central axial space ofthe device between the bends 8, 9, 20 and 21. rIwo opposite sets of passages are thus formed, extending transversely of the device, as shown in Figure 1,' and from the axial central space of the device lead the flaring slits or spaces 18 and 19, also opposite and at substantially right angles to the passages 24 and 25. The partitions 26 are held in their proper spaced positions by any suitable means, such as spot welding.

It will be understood that the said partitions, when assembled as described in the casing 1, provide four quadrangular longitudinal passages and of these the two from in Fi which the transverse passages 24 and 25 lead are left open at their inner ends to receive the flow, .while the other two quadrangular passages are closed by an end plate 27, Figure 5, applied in any. suitable manner as illustrated by the lugs 28 on the partitions having apertures so, that the end plate can be bolted to said lugs by means of the apertures 29 in the plate. Any other substantially impervious manner of applying` the end plate could be employed, said end plate closing the two quadrangular longitudinal passages and also the ends of the transverse passages 18, 19, 24 and 25.

At the other end of the casing is an end plate 30 which is similarly applied to close the endsof the quadrangular passages which are open at the first described end and to leave open the quadrangular passages which are closed at the first' described end. This end plate 30, which is shown inelevation in Figure 3, also closes the ends of the transverse passages 18, 19, 24 and 25 and is secured to lugs 31 to hold it in place.

In operation, as upon'A a gas engine of an automobile, the gases passing along the ltubular casing 1 enter the ends of the quadrangular passages which are open and from thence pass between the partitions 2,6 through the opposite passages 24, 25 in jets which meet at the central-axial line'of the device; the gases after thus meeting escape laterally in both directions through the passages 18, 19, into the other pair of quadrangular pass ages and are discharged through the outer open ends of these quadrangular passages. Furthermore, the inwardly Acontracting passages 24, 25 form with the outwardly Haring passages 18, 19 compoundvVenturi tubes or -passages which reduce the pressure and secure a suction effect which facilitates the flow of exhaust ases through the mufiler. Back pressure is t us avoided, as well as any noise resulting from the exhaust.

Under some conditions I may apply to the outlet end of my improved muler, as shown res 1, 2 and 6, a Venturi tube or nozzle 32, which still further facilitates the outflow or escape of the gases. I have shown this Venturi tube or nozzle 32 as secured onto pipe 1 of which are inlet passages and communicate with the chamber of the casing by adjacent openings opposed to each other and adapted to discharge meeting currents.

2. A muliler comprising a tubular casing, partitions in said casing dividing the chamber 'thereof into longitudinal passages two of which are inlet passages and two outlet passages, and a series of transverse compound 'Venturi tubes leading from the inlet passages to the outlet passages.

3. A mufiler comprising a tubular casing,

partitions in said casing` dividing the chamber thereof into longitudinal passages two of which are inlet passages and two outlet passages, a series of transverse compound Venturi tubes leading from the inlet passages to the outlet passages, and end plates one closing the outlet passages at the inlet end of the casing and theother closing the inlet passages at the outlet end of the casing.

` 4. muffler comprising a tubular casing, partitions in said casing dividing the chamber thereof into a pair of longitudinal inlet passages havng tapering discharge slits opposed to each other and longitudinal outlet passages having flaring discharge slits leadlng from thespace between the discharge slits of the inlet passages, and spaced transverse partitions in said discharge slits of the inlet passages.

cHAs. G. sTooKToN., 

